internal OdfDomRangeCollection(OdfDomParagraph paragraph)
        {
            if (paragraph == null)
            {
                throw new ArgumentNullException("paragraph");
            }

            _paragraph = paragraph;
        }
        public override IParagraph Add()
        {
            OdfDomParagraph paragraph = new OdfDomParagraph(_textDocument);

            if (paragraph != null)
            {
                Add(paragraph);
            }

            return paragraph;
        }